Electricity storage device and vehicle

Abstract

The power storage device includes a first power storage stack and a second power storage stack each including a plurality of power storage cells, a lower case, a lateral member that partitions a region in the lower case, an electrical connection member including an extension portion extending along the lateral member, and a first protection member and a second protection member that protect the electrical connection member. The first protective member includes a bottom portion and a pair of wall portions, and is fixed to the upper wall of the cross member, the extension portion passes between the pair of wall portions, and the second protective member includes a covering portion covering the extension portion between the pair of wall portions, and is held by the first protective member in a state of being in contact with the upper ends of the pair of wall portions.

Description

Technical Field

[0001] This disclosure relates to energy storage devices and vehicles equipped with such energy storage devices. Background Technology

[0002] As an existing energy storage device, Japanese Patent Application Publication No. 2023-046945 discloses the following structure: a transverse member is arranged between adjacent battery modules in a housing containing multiple battery modules (energy storage stacks), and a mounting member for supporting the upper housing is provided on the transverse member.

[0003] A shock absorber is positioned between the portion of the upper housing located above the mounting component and the vehicle body. When a load is input from below the housing, it is transmitted to the vehicle body via the lateral component and the mounting component. At this time, by utilizing the shock absorber positioned along the input path from the upper housing to the vehicle body to absorb a portion of the load, the load input to the vehicle body can be reduced. Summary of the Invention

[0004] Multiple battery packs housed within the containment shell are electrically connected via electrical connection components. When a load is applied from outside the containment shell, the electrical connection components and the battery packs may sometimes interfere with each other.

[0005] This disclosure was made in view of the aforementioned problems, and the object of this disclosure is to provide an energy storage device and a vehicle equipped with the energy storage device that can suppress the vibration of the electrical connection parts while suppressing the interference between the electrical connection parts and the energy storage pile under external load.

[0006] The energy storage device based on this disclosure includes: a first energy storage stack and a second energy storage stack comprising a plurality of energy storage units; a lower housing on which the first energy storage stack and the second energy storage stack are disposed; a transverse member disposed between the first energy storage stack and the second energy storage stack, dividing a region within the lower housing; an electrical connection member electrically connecting the first energy storage stack and the second energy storage stack, including an extension extending along the transverse member above the transverse member; and a first protective member and a second protective member protecting the electrical connection member. The first protective member includes a bottom and a pair of wall portions facing each other in an intersecting direction intersecting the extension direction and connected to the bottom, and the first protective member is fixed to the upper wall of the transverse member. The extension portion passes between the pair of wall portions. The second protective member includes a covering portion between the pair of wall portions that covers the extension portion, and is held in the first protective member in contact with the upper ends of the pair of wall portions.

[0007] According to the above configuration, the rigidity of the lower shell is increased in the area where the transverse member is fixed. Therefore, when an impact is input to the lower shell from the outside, deformation around the transverse member is suppressed. This suppresses the input of external forces into the extension portion of the electrical connection member that extends along the transverse member above it. Consequently, deformation of the electrical connection member is suppressed, and interference between the electrical connection member and the battery stack is suppressed. Furthermore, since the extension portion passes between a pair of walls of the first protective member, interference between the extension portion and the battery stack is further suppressed. In addition, the second protective member, which is held in place of the first protective member, has a covering portion that covers the extension portion of the electrical connection member, further suppressing vibrations and impacts applied to the electrical connection member.

[0008] Based on the energy storage device disclosed herein, it may also include an upper component that encloses the lower casing and covers the first and second energy storage stacks from above. In this case, the upper surface of the second protective component may contact the upper component, and a gap may be provided between the lower end of the covering portion and the bottom.

[0009] According to the above configuration, by forming a gap between the bottom of the first protective member and the covering portion that covers the extension of the electrical connection member, the load from the upper member side is transmitted to the transverse member through a pair of wall portions of the first protective member. This prevents the load from being transmitted to the extension covered by the covering portion.

[0010] In the energy storage device based on the present disclosure, the upper surfaces of the pair of walls may also be flat. The second protective member may also include an upper end portion having the upper surface of the second protective member and extending above the covering portion in the aforementioned intersecting direction. The upper end portion may also have a protrusion that, when viewed from below, protrudes from the covering portion in the aforementioned intersecting direction. In this case, the protrusion may also have an inclined portion that contacts the end portion of the upper surface of the pair of walls located inside the aforementioned intersecting direction and slopes upwards as it moves outwards in the aforementioned intersecting direction.

[0011] According to the above configuration, by providing an inclined portion at the protrusion of the second protective member, when a load is input from the upper side of the upper member, the pair of walls of the first protective member deform in a manner that separates them from each other. In addition to this deformation, by also forming a gap between the lower end of the second protective member and the bottom of the first protective member, the load input to the electrical connection member can be further reduced.

[0012] The vehicle based on this disclosure has a body and the described energy storage device mounted on the body.

[0013] According to the above configuration, by equipping the vehicle with the above-mentioned energy storage device, it is possible to suppress the vibration of the electrical connection components, suppress the interference between the electrical connection components and the energy storage stack, and suppress short circuits in the energy storage stack.

[0014] In the vehicle based on the present disclosure, the vehicle body may also include a floor, and the energy storage device may be disposed below the floor. In this case, the vehicle may also further include a buffer member disposed between the floor and the energy storage device. The buffer member may also be disposed above the first protective member and the second protective member.

[0015] According to the above configuration, when an impact is applied to the energy storage device from the outside, the buffer member can reduce the external force transmitted to the floor. Furthermore, when mounting the energy storage device onto the vehicle body, by mounting it against the buffer member, the reaction force can be used to press the first and second protective members against the lateral members. This suppresses the vibration of the first and second protective members, and further suppresses the vibration of the electrical connection members covered by the second protective member.

[0016] In the vehicle based on the present disclosure, the vehicle body may also include a frame component. The energy storage device may also include an upper component that encloses the lower housing and covers the first and second energy storage stacks from above. In this case, the vehicle may also further include a buffer component disposed between the upper component and the frame component. The buffer component may also be disposed above the first and second protective components.

[0017] According to the above configuration, when an impact is applied to the energy storage device from the outside, the buffer member can reduce the external force transmitted to the vehicle's frame member. Furthermore, when mounting the energy storage device to the vehicle body, by mounting it against the buffer member, the reaction force can be used to press the first and second protective members against the lateral members. This suppresses the vibration of the first and second protective members, and further suppresses the vibration of the electrical connection members covered by the second protective member.

[0018] In the vehicle based on the present disclosure, the energy storage device may also include an upper component that closes the lower housing and covers the first and second energy storage stacks from above. In this case, the vehicle may also further include a protective cover that covers a portion of the upper component from above, forming a space between the protective cover and the upper component. The protective cover may also have a pair of sidewall portions that are separately arranged from each other in the extending direction of the transverse component. The first and second protective components may also be disposed below the lower surfaces of the respective pair of sidewall portions.

[0019] According to the above configuration, the load from the protective cover can be used to press the first protective member and the second protective member toward the horizontal member via the upper member. As a result, the vibration of the first protective member and the second protective member can be suppressed, and furthermore, the vibration of the electrical connection member covered by the second protective member can also be suppressed.

[0020] According to this disclosure, it is possible to provide an energy storage device and a vehicle equipped with the energy storage device that can suppress the vibration of the electrical connection component while suppressing the interference between the electrical connection component and the energy storage stack under external load. Attached Figure Description

[0021] The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals denote the same elements, and wherein: Figure 1 This is a schematic diagram of the vehicle involved in Implementation Method 1; Figure 2 This is a diagram showing the case where the energy storage device according to Embodiment 1 is fixed to the vehicle body; Figure 3 This is an exploded perspective view of the energy storage device according to Embodiment 1; Figure 4 This is a top view showing the interior of the energy storage device according to Embodiment 1; Figure 5 It is along Figure 4 The cross-sectional view of the VV line shown; and Figure 6 This is a schematic cross-sectional view showing the positional relationship between the protective cover of the vehicle and the first and second protective components of the energy storage device according to Embodiment 2. Detailed Implementation

[0022] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in the embodiments shown below, the same reference numerals are used to label the same or common parts in the drawings, and their description will not be repeated.

[0023] Furthermore, in the embodiments described below, when numbers, quantities, etc., are mentioned, the scope of this disclosure is not necessarily limited to those numbers, quantities, etc., unless specifically stated otherwise. Additionally, in the embodiments described below, each constituent element is not necessarily essential to this disclosure, unless specifically stated otherwise. Furthermore, in the cases where multiple embodiments exist, unless specifically stated otherwise, the appropriate combination of the characteristic portions of each embodiment is predetermined from the outset. Implementation Method 1

[0024] Figure 1This is a schematic diagram of the vehicle involved in Implementation Method 1. Figure 2 This diagram illustrates the case where the energy storage device according to Embodiment 1 is fixed to the vehicle body. (Refer to...) Figure 1 and Figure 2 The vehicle 1 involved in Embodiment 1 will be described.

[0025] Vehicle 1 is a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a battery electric vehicle.

[0026] Vehicle 1 includes a vehicle body 2, front wheels 3, rear wheels 4, and an energy storage device 10. The vehicle body 2 includes a frame component 5. The energy storage device 10 has an upper surface 10a. This upper surface 10a can also function as a floor component within the vehicle's interior.

[0027] The frame component 5 includes a pair of longitudinal beams 6 and a pair of side beams 7. The pair of side beams 7 are disposed at both ends in the width direction of the vehicle 1. The pair of longitudinal beams 6 are disposed at a distance from the inside of the pair of side beams 7. The pair of longitudinal beams 6 and the pair of side beams 7 extend along the front-rear direction of the vehicle 1.

[0028] A pair of longitudinal beams 6 are separated in the width direction of the vehicle 1. The main body 35 of the energy storage device 10 is disposed in the gap between the pair of longitudinal beams 6. A gap is provided between the main body 35 and the pair of longitudinal beams 6. Therefore, even in the event of a side collision of the vehicle 1, the impact input to the energy storage device 10 can be suppressed.

[0029] Fixed portions 36 are provided on both sides of the main body 35 in the width direction of vehicle 1. The fixed portions 36 are fixed to a pair of longitudinal beams 6 by fastening members 8.

[0030] The frame component 5 also includes a vehicle side transverse component 9. The vehicle side transverse component 9 is arranged such that it spans from one side beam 7 to the other side beam 7 above the energy storage device 10. The upper surface 10a of the energy storage device 10 is fixed to the vehicle side transverse component 9. This upper surface 10a is formed by the upper component 31 (described later). Figure 3 )constitute.

[0031] Furthermore, the above description illustrates a case where the frame component 5 includes a pair of longitudinal beams 6 and a pair of side beams 7, but it is not limited to this. The pair of side beams 7 may also function as a pair of longitudinal beams 6. In this case, the pair of longitudinal beams 6 can be omitted, and the aforementioned fixed part 36 can also be fixed to the pair of side beams 7.

[0032] Figure 3 This is a schematic exploded perspective view of the energy storage device according to Embodiment 1. Figure 4 This is a schematic top view showing the interior of the energy storage device according to Embodiment 1. (See reference...) Figure 3 and Figure 4 Details of the energy storage device 10 will be explained. Furthermore, in Figure 3 For convenience, the second protective component 70 is omitted from the illustration. Figure 4 For convenience, the following has been omitted. Figure 3 The fixed part 36 is shown in the illustration.

[0033] like Figure 3 and Figure 4 As shown, the energy storage device 10 includes multiple energy storage stacks 20, a housing 30, a lateral component 40, multiple first protection components 50, multiple electrical connection components 60, multiple second protection components 70, and electronic equipment 95.

[0034] Each of the multiple energy storage stacks 20 includes multiple energy storage units 25. The multiple energy storage units 25 are arranged in a first direction (DR1). In this embodiment, the first direction is parallel to the width direction of the vehicle 1 when the energy storage device 10 is mounted on the vehicle body 2.

[0035] Each energy storage unit 25 is, for example, a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. Each energy storage unit 25 can use either a liquid electrolyte or a solid electrolyte. Each energy storage unit 25 can also be a capacitor capable of charging and discharging.

[0036] Specifically, the energy storage unit 25 includes a housing 28 (see reference). Figure 5 ) and electrode body 29 (refer to) Figure 5 The electrode body 29 is housed within the housing 28. The electrode body 29 can be a stacked electrode body composed of a negative electrode, a spacer, and a positive electrode, or a wound electrode body composed of a negative electrode, a spacer, and a positive electrode wound together.

[0037] Each energy storage unit 25 includes a positive external terminal 26 and a negative external terminal 27. In each energy storage stack 20, multiple energy storage units 25 are connected in series via a busbar. The multiple energy storage units 25 are arranged in a manner in which the positive external terminal 26 and the negative external terminal 27 are alternately arranged in a first direction. In each energy storage stack 20, multiple energy storage units 25 are arranged.

[0038] Multiple battery stacks 20 are arranged in a second direction (DR2). The second direction is orthogonal to the first direction. In this embodiment, the second direction is parallel to the longitudinal direction of the vehicle 1 in the above-described mounting state.

[0039] The housing 30 includes an upper component 31 and a lower housing 32. The lower housing 32 has a generally box-shaped shape with an upward opening. Multiple battery packs 20 are disposed within the lower housing 32.

[0040] The lower shell 32 includes a main body portion 35 and a fixed portion 36. The main body portion 35 has a bottom wall portion 321, a first wall portion 322, a second wall portion 323, and side wall portions 324 and 325. The first wall portion 322, the second wall portion 323, and the side wall portions 324 and 325 are arranged to stand upright from the periphery of the bottom wall portion 321.

[0041] The first wall portion 322 and the second wall portion 323 are opposite to each other in the second direction. The side wall portions 324 and 325 are opposite to each other in the first direction. The fixed portion 36 is provided on the outer surface of the side wall portions 324 and 325.

[0042] The upper component 31 has a generally flat plate shape. The upper component 31 covers the plurality of battery stacks 20 from above, enclosing the open space of the lower casing 32. A sealing component may also be filled in the gap between the upper component 31 and the battery stacks 20. The sealing component may also be insulating. In addition to functioning as a cover component to enclose the open space of the lower casing 32 as described above, the upper component 31 may also function as a base plate.

[0043] The lateral member 40 is fixed to the lower housing 32. The lateral member 40 is made of a metal component such as SUS. The lateral member 40 extends along a first direction. The lateral member 40 divides the area within the lower housing 32. Specifically, as the area where the battery stacks are configured, the lateral member 40 divides the area within the lower housing 32 into two, and two battery stacks 20 are configured in each of the divided areas.

[0044] The aforementioned plurality of battery stacks 20 includes a first battery stack 21 and a second battery stack 22 arranged at an open interval in a second direction. The first battery stack 21 and the second battery stack 22 are arranged adjacent to each other in a second direction, and a transverse member 40 is disposed in the gap between the first battery stack 21 and the second battery stack 22.

[0045] Multiple first protective components 50 extend upward from the transverse component 40. The multiple first protective components 50 are fixed to the transverse component 40. Furthermore, the vertical direction is orthogonal to the aforementioned first and second directions. The multiple first protective components 50 are arranged with a gap in the first direction.

[0046] Each of the plurality of second protective components 70 is disposed at a position corresponding to a plurality of first protective components 50. Each of the plurality of second protective components 70 is held in place by a plurality of first protective components 50. Furthermore, for details regarding the first protective components 50 and the second protective components 70, please refer to... Figure 5 To be discussed later.

[0047] Electronic device 95 is positioned on the side further in the second direction than the plurality of battery stacks 20. Electronic device 95 is, for example, a battery ECU (Electronic Control Unit).

[0048] Multiple electrical connection components 60 connect multiple energy storage stacks 20 arranged in a second direction in series. The multiple electrical connection components 60 include electrical connection components 61, 62, 63, 64, and 65.

[0049] Electrical connection component 61 connects, for example, the negative terminal of a battery module consisting of multiple battery stacks 20 to an electronic device 95. Electrical connection component 62 connects two battery stacks 20 arranged in series in a region located on one side of the transverse component 40 in the second direction.

[0050] Electrical connection component 63 electrically connects the first battery stack 21 and the second battery stack 22. More specifically, electrical connection component 63 electrically connects a first battery module to a second battery module, wherein the first battery module consists of two battery stacks 20 arranged in a region on one side of the transverse component 40 in the second direction, and the second battery module consists of two battery stacks 20 arranged in a region on the other side of the transverse component 40 in the second direction.

[0051] Viewed from above, the electrical connection member 63 overlaps with the transverse member 40 in at least a portion and extends along the extending direction of the transverse member 40. The electrical connection member 63 has a first wiring portion 631, an extension portion 632, and a second wiring portion 633. The first wiring portion 631 extends from the first battery pack 21 toward the transverse member 40 along a second direction.

[0052] Viewed from above, the extension 632 overlaps with the transverse member 40. The extension 632 is located above the transverse member 40 and extends along the transverse member 40. The width of the extension 632 in the second direction is shorter than the width of the transverse member 40. In the extending direction of the transverse member 40, the length of the extension 632 is shorter than the length of the transverse member 40.

[0053] The second wiring section 633 extends toward the second battery pack 22 along the second direction on the opposite side of the first wiring section 631 in the first direction.

[0054] Electrical connection component 64 connects two battery stacks 20 arranged in series in a region on the opposite side of the lateral component 40 in the second direction. Electrical connection component 65 connects, for example, the positive terminal of a battery module composed of multiple battery stacks 20 to an electronic device 95.

[0055] The aforementioned electrical connection components 61 to 65 are composed of busbars. In this embodiment, the electrical connection components 61 to 65 are, for example, composed of metal components, and the first protective component 50 and the second protective component 70 are, for example, composed of insulating components.

[0056] Figure 5 It is along Figure 4 A schematic cross-sectional view of the VV line shown. (Refer to...) Figure 5 Details of the transverse component 40, the first protective component 50, and the second protective component 70 are described below.

[0057] like Figure 5 As shown, the transverse component 40 has a hollow structure. The transverse component 40 includes a pair of sidewall portions 41 and 42 and an upper wall portion 43. The pair of sidewall portions 41 and 42 are opposite each other in the direction in which the first battery stack 21 and the second battery stack 22 are arranged, i.e., in the second direction.

[0058] Sidewall portion 41 is located on the side of the first battery stack 21. At the lower end of sidewall portion 41, a flange portion 41f extending toward the first battery stack 21 is provided. Sidewall portion 42 is located on the side of the second battery stack 22. At the lower end of sidewall portion 42, a flange portion 42f extending toward the second battery stack 22 is provided.

[0059] The transverse component 40 is fixed to the bottom wall 321 of the lower shell 32 by means of welding or fastening through the aforementioned flanges 41f and 42f.

[0060] The upper wall portion 43 connects the upper ends of a pair of side wall portions 41 and 42 to each other. A through hole 43h is provided in the upper wall portion 43. The engaging portion 53p, described later, is inserted into this through hole 43h.

[0061] The first protective member 50 includes a pair of wall portions 51, 52 and a bottom 53. The pair of wall portions 51, 52 face each other in an intersecting direction that intersects the extending direction of the extension 632. Specifically, the pair of wall portions 51, 52 face each other in a second direction. The pair of wall portions 51, 52 are arranged with a gap between each other in the second direction. The extension 632 passes through the space between the pair of wall portions 51, 52. The pair of wall portions 51, 52 are connected to the bottom 53. The pair of wall portions 51, 52 have upper surfaces 51a, 52a. The upper surfaces 51a, 52a are flat. The upper surfaces 51a, 52a are parallel to the second direction.

[0062] The bottom part 53 is mounted on the upper wall portion 43 of the transverse member 40. A downwardly protruding engaging portion 53p is provided on the lower surface of the bottom part 53. When inserted into the through hole 43h provided in the transverse member 40, the engaging portion 53p engages with the portion of the upper wall portion 43 located at the periphery of the through hole 43h. Thus, the first protective member 50 is fixed to the transverse member 40. With this configuration, the first protective member 50 can be easily fixed. Alternatively, the first protective member 50 can also be fixed to the transverse member 40 by welding or fastening.

[0063] The second protective member 70 has a covering portion 71 and an upper end portion 72. The covering portion 71 is disposed between a pair of wall portions 51 and 52. The covering portion 71 covers a portion of the extension 632. More specifically, the covering portion 71 covers the portion of the extension 632 located between the pair of wall portions 51 and 52. The covering portion 71 covers the extension 632 in a state of close contact with the circumferential surface of the extension 632. The covering portion 71 extends in the vertical direction. The covering portion 71 is held between the pair of wall portions 51 and 52.

[0064] A gap is formed between the lower end of the covering portion 71 and the bottom 53 of the first protective member 50. Therefore, when a load is transferred downwards from the upper member 31, it is transferred to the transverse member 40 via the pair of wall portions 51, 52 of the first protective member 50. As a result, the transfer of the load to the extension 632 covered by the covering portion 71 is suppressed.

[0065] The upper end portion 72 has an upper surface 70a of the second protective member 70, extending in the aforementioned intersecting direction (more specifically, the second direction). The upper surface 70a is flat and contacts the inner surface of the upper member 31. The upper end portion 72 is located above the covering portion 71. The upper end portion 72 is connected to the covering portion 71. The upper end portion 72 has a protrusion 721 that, when viewed from below, protrudes from the covering portion 71 in the aforementioned intersecting direction.

[0066] The protrusion 721 is clamped between the upper member 31 and the upper surface 50a (i.e., upper surfaces 51a, 52a) of the first protective member 50. Thus, the second protective member 70 is held in contact with the upper ends of the pair of wall portions 51, 52 within the first protective member 50. This suppresses vibration of the second protective member 70, and further suppresses vibration of the extension 632 covered by the covering portion 71 of the second protective member 70.

[0067] The protrusion 721 contacts at least the inner end of the upper surfaces 51a and 52a of the pair of wall portions 51 and 52 located in the aforementioned intersecting direction. Furthermore, the protrusion 721 may only need to be able to press the pair of wall portions 51 and 52 in a direction that widens towards each other, as described later. It may make partial contact with the inner portion of the upper surfaces 51a and 52a of the pair of wall portions 51 and 52, or it may make full contact with the upper surfaces 51a and 52a of the pair of wall portions 51 and 52.

[0068] The protrusion 721 has an inclined portion 721a that slopes upwards as it moves outwards in the intersecting direction. The inclined portion 721a forms the lower surface of the protrusion 721.

[0069] By providing the inclined portion 721a in this way, when a load is applied downwards from the upper component 31 side, the pair of wall portions 51, 52 of the first protective component 50 are pressed by the inclined portion 721a and deformed in a way that separates them from each other. In addition to this deformation, by forming a gap between the lower end of the second protective component 70 and the bottom 53 of the first protective component 50 as described above, the load input to the electrical connection component 63 can be further reduced.

[0070] Additionally, vehicle 1 includes a buffer member 90. The buffer member 90 is disposed between the vehicle body 2 and the upper member 31. More specifically, the buffer member 90 is disposed between the side transverse member 9 and the upper member 31. The buffer member 90 is disposed above the first protective member 50 and the second protective member 70, and is sandwiched between the side transverse member 9 and the upper member 31.

[0071] With the buffer member 90 configured in this way, when an impact is applied to the energy storage device 10 from the outside, the buffer member 90 can reduce the external force transmitted to the frame member 5 of the vehicle 1. Furthermore, when the energy storage device 10 is mounted on the vehicle body 2, by mounting the energy storage device 10 against the buffer member 90, the reaction force can be used to press the first protective member 50 and the second protective member 70 against the lateral member 40. This suppresses the vibration of the first protective member 50 and the second protective member 70, and further suppresses the vibration of the electrical connection member 63 covered by the second protective member 70.

[0072] Furthermore, the above example illustrates a case where the upper component 31 functions as a base plate and a buffer component 90 is disposed between the vehicle side transverse component 9 and the upper component 31, but this is not a limitation. When the vehicle body 2 has a base plate 110 and the energy storage device 10 is disposed below the base plate 110, the buffer component 90 can be disposed between the base plate 110 and the upper component 31 instead of the aforementioned vehicle side transverse component 9. In this case, the buffer component 90 is located above the first protective component 50 and the second protective component 70.

[0073] With the buffer member 90 configured as described above, the external force transmitted to the floor plate 110 can be reduced when an impact is applied to the energy storage device 10 from the outside. Furthermore, when the energy storage device 10 is mounted on the vehicle body 2, by mounting the energy storage device 10 against the buffer member 90, the reaction force can be used to press the first protective member 50 and the second protective member 70 against the transverse member 40. This suppresses the vibration of the first protective member 50 and the second protective member 70, and further suppresses the vibration of the electrical connection member 63 covered by the second protective member 70.

[0074] As described above, in the energy storage device 10 according to this embodiment, the rigidity of the lower shell 32 is increased in the area where the transverse member 40 is fixed. Therefore, when an impact is input to the lower shell 32 from the outside, deformation around the transverse member 40 is suppressed. This suppresses the input of external forces to the extension 632 of the electrical connection member 63, which extends above the transverse member 40 along the transverse member 40. Consequently, deformation of the electrical connection member 63 is suppressed, and interference between the electrical connection member 63 and the energy storage stack 20 (specifically, the first energy storage stack 21 and / or the second energy storage stack 22) is suppressed. Furthermore, since the extension 632 passes between a pair of wall portions 51, 52 of the first protective member 50, interference between the extension 632 and the energy storage stack 20 is further suppressed. In addition, the second protective member 70, which is held in the first protective member 50, has a covering portion 71 that covers the extension 632 of the electrical connection member 63, which also suppresses vibrations and impacts applied to the electrical connection member 63. Implementation Method 2

[0075] Figure 6 This is a schematic cross-sectional view showing the positional relationship between the protective cover of the vehicle and the first and second protective components of the energy storage device according to Embodiment 2. (Refer to...) Figure 6 The vehicle 1A involved in the second implementation method will be described.

[0076] like Figure 6 As shown, compared with the vehicle 1 according to Embodiment 1, the vehicle 1A according to Embodiment 2 differs in that it has a protective cover 80 and wiring 85, and in the positions of the first protective member 50 and the second protective member 70. The other configurations are almost the same.

[0077] A protective cover 80 protects the wiring 85 that is routed above the upper component 31. The protective cover 80 covers a portion of the upper component 31 from above, forming a space S between itself and the upper component 31. The wiring 85 is located within this space S. The protective cover 80 is configured to overlap a portion of the transverse component 40 when viewed from the vertical direction. The protective cover 80 is configured to overlap the central portion of the transverse component 40, for example, in the extending direction of the transverse component 40 when viewed from above. The protective cover 80 extends in a direction intersecting the extending direction of the transverse component 40. Specifically, the protective cover 80 extends in a second direction.

[0078] The protective cover 80 has a pair of sidewall portions 81 and 82 and a top 83. The pair of sidewall portions 81 and 82 are arranged separately from each other in the extending direction of the transverse member 40. The pair of sidewall portions 81 and 82 have lower surfaces 81a and 82a. The top 83 connects the upper ends of the pair of sidewall portions 81 and 82 to each other.

[0079] The first protective component 50 and the second protective component 70 are disposed below the lower surfaces 81a and 82a of the pair of sidewall portions 81 and 82, respectively. The first protective component 50 and the second protective component 70 are clamped by the upper component 31 and the transverse component 40 below the lower surfaces 81a and 82a.

[0080] Even with the configuration described above, the vehicle 1A according to Embodiment 2 can achieve almost the same effect as the vehicle 1 equipped with the energy storage device 10 according to Embodiment 1. Furthermore, by arranging the first protective member 50 and the second protective member 70 below the lower surfaces 81a and 82a of each of the pair of sidewall portions 81 and 82, the first protective member 50 and the second protective member 70 can be pressed towards the transverse member 40 via the upper member 31 using the load from the protective cover 80. This suppresses vibration of the first protective member 50 and the second protective member 70, and further suppresses vibration of the electrical connection member 63 covered by the second protective member 70.

[0081] In the above embodiments one and two, the case where the first direction is parallel to the width direction of the vehicle and the second direction is parallel to the front-rear direction of the vehicle is illustrated, but it is not limited to this. The first direction may also be parallel to the front-rear direction of the vehicle, and the second direction may also be parallel to the width direction of the vehicle.

[0082] Furthermore, in the above-described embodiments one and two, the case in which multiple energy storage stacks 20 are arranged in a row is illustrated, but it is not limited to this and can also be arranged in a matrix.

[0083] The embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the invention is defined by the claims and includes all modifications within the meaning and scope of the claims.

Claims

1. An energy storage device, comprising: A first energy storage stack and a second energy storage stack comprising multiple energy storage units; The lower casing is equipped with the first energy storage stack and the second energy storage stack; A lateral component, disposed between the first and second energy storage stacks, separates the area within the lower casing; An electrical connection component, which electrically connects the first and second battery stacks, is included in an extension extending along the transverse component above the transverse component; as well as The first and second protective components protect the electrical connection components. The first protective member includes a bottom and a pair of wall portions facing each other and connected to the bottom in an intersecting direction that intersects the extending direction of the extension portion, and the first protective member is fixed to the upper wall of the transverse member. The extension passes between the pair of wall portions. The second protective member includes a covering portion that covers the extension between the pair of walls and is held in contact with the upper ends of the pair of walls in the first protective member.

2. The energy storage device according to claim 1, wherein, It also includes an upper component that encloses the lower shell and covers the first and second battery stacks from above. The upper surface of the second protective component is in contact with the upper component. A gap is provided between the lower end of the covering part and the bottom.

3. The energy storage device according to claim 2, wherein, The upper surfaces of the pair of walls are flat. The second protective member includes an upper end portion having the upper surface of the second protective member and extending in the intersecting direction above the covering portion. The upper end has a protrusion that, when viewed from below, protrudes from the covering portion in the intersecting direction. The protrusion has an end that contacts the inner end of the upper surface of the pair of walls in the intersecting direction and slopes upward as it moves outward in the intersecting direction.

4. A vehicle, comprising: Body; and An energy storage device, as described in any one of claims 1 to 3, mounted on the vehicle body.

5. The vehicle according to claim 4, wherein, The vehicle body includes a floor. The energy storage device is located below the base plate. The vehicle also includes a buffer component disposed between the floor and the energy storage device. The buffer component is positioned above the first protective component and the second protective component.

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